From owner-FreeBSD-tech-jp@jp.freebsd.org  Wed Aug  5 23:30:36 1998
Received: (from daemon@localhost)
	by jaz.jp.freebsd.org (8.8.8+3.0Wbeta13/8.7.3) id XAA05720;
	Wed, 5 Aug 1998 23:30:36 +0900 (JST)
	(envelope-from owner-FreeBSD-tech-jp@jp.FreeBSD.org)
Received: from nocp5.noc.titech.ac.jp (nocp5.noc.titech.ac.jp [131.112.126.6])
	by jaz.jp.freebsd.org (8.8.8+3.0Wbeta13/8.7.3) with SMTP id XAA05707
	for <FreeBSD-tech-jp@jp.freebsd.org>; Wed, 5 Aug 1998 23:30:33 +0900 (JST)
	(envelope-from aki@toto.noc.titech.ac.jp)
Received: (qmail 8079 invoked from network); 5 Aug 1998 14:33:31 -0000
Received: from nocs1.noc.titech.ac.jp (root@131.112.126.1)
  by nocp5.noc.titech.ac.jp with SMTP; 5 Aug 1998 14:33:31 -0000
Received: by nocs1.noc.titech.ac.jp  id XAA27256;
	Wed, 5 Aug 1998 23:30:21 +0900 (JST)
Received: (from aki@localhost)
	by toto.noc.titech.ac.jp (8.8.5/8.8.5) id UAA02697;
	Wed, 5 Aug 1998 20:48:16 +0900 (JST)
Message-Id: <199808051148.UAA02697@toto.noc.titech.ac.jp>
To: FreeBSD-tech-jp@jp.freebsd.org
Cc: FreeBSD-users-jp@jp.freebsd.org
From: IIJIMA Akihiro <aki@noc.titech.ac.jp>
X-Mailer: Mew version 1.52 on Emacs 19.28.1, Mule 2.3
Mime-Version: 1.0
Content-Type: Text/Plain; charset=iso-2022-jp
Content-Transfer-Encoding: 7bit
Date: Wed, 05 Aug 1998 20:48:16 +0900
Reply-To: FreeBSD-tech-jp@jp.freebsd.org
Precedence: bulk
X-Distribute: distribute version 2.1 (Alpha) patchlevel 24e+980729
X-Sequence: FreeBSD-tech-jp 1688
Subject: [FreeBSD-tech-jp 1688] Disk write speed
Errors-To: owner-FreeBSD-tech-jp@jp.freebsd.org
Sender: owner-FreeBSD-tech-jp@jp.freebsd.org

$BB3$+$J$$$H;W$&$1$I(B FreeBSD-tech-jp $B$K?6$j$^$9!#(B
users-jp$B$K$OJV;v$r=P$5$J$$$G$M!#(B

$B85$NOC$O(B [FreeBSD-users-jp 31470] $B$G$9!#(B

> news$B%5!<%P$r(BAIX$B$N(BRS6000$B$+$i(BPentiumII$B$N(BFreeBSD-300Mhz$B$KF~$lBX$($h$&$H(B
> INN$B$rF~$l$F$_$?$H$3$m!"(B

INN$B$N(B version$B$O!)(B
FreeBSD$B$N(B version$B$O!)(B

> $B$d$1$KF0:n$,CY$$5$$,$7$^$9!#(B
> $B$b$7$+$7$F(BFreeBSD$B$N(BDISK-IO$B$C$FCY$$$s$G$7$g$&$+!)(B

AIX$B$N(B $B$=$N%^%7%s$HHf$Y$F$O(B $B$I$&$@$+$o$+$j$^$;$s$,!"(B
SCSI$B$O(B $BCY$$$G$9!#(BIDE$B$O(B FreeBSD 3.X $B$K$J$k$HAa$$$G$9!#(B

	$B!v!v!v(B

http://www.jp.qmail.org/ $B$NCf$K(B
  FreeBSD$B$G$N(BDisk$B%"%/%;%9$NB.EY(B(random write)$B$NHf3S(B
$B$N%Z!<%8$,$"$j$^$9!#$=$3$r8+$F$d$C$F$/$@$5$$!#(B

$BH`$ND4$Y$K$h$k$H(B

IDE$B$K$D$$$F$O(B
  2.X$B7O(B 3.X$B7O(B $B$H$b(B FreeBSD$B$NJ}$+$i(B Disk$BK\BNB&$N(Bwrite cache$B$rM-8z$K$7$F(B
  $B$$$k$N$G8z2L$,8=$l$F$$$k!#$3$l$,$+$J$j8z$/!#(B
  2.X$B7O$O(B DMA$B%"%/%;%9$O;H$($J$$!#(B
  3.X$B7O$O(B DMA$B$,;H$($k$N$GAa$$!#(B
  2.X$B7O$O(B 32bit$B%"%/%;%9$J$I$b(B off$B$K$J$C$F$$$k!#$3$l$O(B kernel$B$N(B
  wd$B%G%P%$%9$N(B flag$B;XDj$G@_Dj$9$k!#(Bman wd $B;2>H!#(B

SCSI$B$K$D$$$F$O(B
  2.X$B7O(B 3.X$B7O(B $B$H$b(B FreeBSD$B$NJ}$+$i(B Disk$BK\BNB&$N(Bwrite cache$B$rM-8z$K$G$-(B
  $B$F$$$J$$$H;W$o$l$k!#$I$&$7$F$=$&H=CG$9$k$+$H$$$&$H!"(B
  Linux$B$K$O(B IDE disk$B$N(B write cache$B$r(B on/off$B$9$k%3%^%s%I$,$"$k$=$&$G!"(B
  (FreeBSD$B$K$O$J$$(B) $B$3$l$r;H$C$F(B write cache$B$r(B off$B$K$7$?$i(B $B$b$N$9$4$/(B
  $BCY$/$J$C$?!#(B
  Disk$B%a!<%+$OF1$8Cf?H(B($BHD(B)$B$r;H$C$F(B IDE$B$H(B SCSI$BHG$r=P$7$F$$$k$N$G!"(B
  SCSI$B$N?t;z$,6a$$(B IDE$B$N(B write cache off$B$N?t;z$K;w$F$$$k$N$O(B
  SCSI$B$b(B write cache off $B$K$J$C$F$$$k$H;W$$$?$$!#(B
   (SCSI$B%+!<%I$N%I%i%$%P$d(B $B%3%s%H%m!<%i(Bchip$B$N%*!<%P!<%X%C%I$b$"$k$G$7$g(B
    $B$&$,(B $B$=$l$K$7$F$bCY$$(B)

$BHV30(B
  Linux$B$O(B DMA$B$r;H$C$F$$$k$h$&$@$,(B 3.X$B7O$G8_3Q$N$h$&$@!#(B
  NetBSD$B$O(B DMA$B$r;H$C$F$^$9!#(B
 
	$B!v!v!v(B

$B$3$N%Z!<%8$GD4$Y$F$$$k$N$O(B random write$B$NB.EY$J$N$G$9$,!"(B
INN-1.?$B$N5-;v$NJ]B8$C$F(B random write $B$NMr$J$N$G(B $B$3$NCY$5$O8z$$$F$-$^$9!#(B

$B$G(B $B$=$l$r(BSCSI$B$G$I$&$9$k$+$H$$$&$H!"(B
1) Disk$B$rJ#?tBf$^$H$a$F(B striping$B$7$F$/$l$k(B ccd$B%G%P%$%9$r;H$C$F(B
   write$B$rJ,;6$7B.EY$r$+$;$0!#(B
2) INN-2 $B$r$D$+$C$F(B time stamp$B$J%"%/%;%9$K@Z$jBX$($k!#(B
	($B:#$^$G$N(BSPOOL$B$r(B traditional$B$H8@$&$=$&$G$9(B)
2) INN-2 $B$r$D$+$C$F(B CNFS$B$r;H$&!#(B
     Disk$B$r%(%s%I%l%9%F!<%W$N$h$&$K;H$&!#(B

INN-2$B$K$D$$$F$O(B $B:#7n9f$N(B UNIX magazine$B$r8+$F$/$@$5$$!#(B

$B$=$&$=$&!"$3$l$KO":\$7$F$$$k(B $B:XF#L@5*$5$s$N(B NetBSD$B$N%G%P%$%9%I%i%$%P$N(B
$BOC$O(B newconfig$B$rM}2r$9$k$N$K$h$$$G$9!#Gc$$$^$7$g$&!#(B
--
$BEl5~9)6HBg3X(B $BAm9g>pJs=hM}%;%s%?!<(B $B%M%C%H%o!<%/%7%9%F%`1?MQ3](B
	$BHSEg(B $B><Gn(B (Akihiro Iijima) aki@noc.titech.ac.jp
striping$B$C$F(B $B%9%H%j%C%W$H$OFI$^$J$$$h$M!)(B $B$=$l$H$b(Bman$B$,4V0c$C$F$$$k!)(B
